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Title: Possible contribution of low shear modulus C₄₄ to the low Young’s modulus of Ti-36Nb-5Zr alloy

Abstract

Despite the importance of single-crystal elastic constants of β-phase titanium alloys in understanding their low Young's modulus—a property crucial for many applications, such data are often difficult to obtain when the alloy composition is close to the instability limit of the β phase, where the presence of α" martensite precludes the fabrication of β-phase single crystal. In the present study, we extracted the single-crystal elastic constants of such a β-phase titanium alloy with low Young's modulus, Ti-36Nb-5Zr (wt. %), from polycrystalline specimens by using an in-situ synchrotron X-ray diffraction technique. It is indicated that the low Young's modulus of the alloy originates from the anomalously low shear modulus C₄₄ as well as the low shear modulus C', which is different from a common viewpoint that the Young's modulus of β-phase titanium alloys is dominantly controlled by the C'. This suggests that low C₄₄ is an important contributor to low Young's modulus for instable β-phase titanium alloys.

Authors:
 [1];  [2];  [3];  [1];  [1]
  1. Beihang Univ., Beijing (China)
  2. Jiangsu Univ., Zhenjiang (China)
  3. Xi'an Jiaotong Univ., Xi'an (China)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
FOREIGN; USDOE
OSTI Identifier:
1168476
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 105; Journal Issue: 13; Journal ID: ISSN 0003-6951: APPLAB
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
ENGLISH
Subject:
elastic moduli; titanium; X-ray diffraction; crystalline alloys; polycrystals

Citation Formats

Meng, Qingkun, Guo, Shun, Ren, Xiaobing, Xu, Huibin, and Zhao, Xinqing. Possible contribution of low shear modulus C₄₄ to the low Young’s modulus of Ti-36Nb-5Zr alloy. United States: N. p., 2014. Web. doi:10.1063/1.4896976.
Meng, Qingkun, Guo, Shun, Ren, Xiaobing, Xu, Huibin, & Zhao, Xinqing. Possible contribution of low shear modulus C₄₄ to the low Young’s modulus of Ti-36Nb-5Zr alloy. United States. https://doi.org/10.1063/1.4896976
Meng, Qingkun, Guo, Shun, Ren, Xiaobing, Xu, Huibin, and Zhao, Xinqing. 2014. "Possible contribution of low shear modulus C₄₄ to the low Young’s modulus of Ti-36Nb-5Zr alloy". United States. https://doi.org/10.1063/1.4896976.
@article{osti_1168476,
title = {Possible contribution of low shear modulus C₄₄ to the low Young’s modulus of Ti-36Nb-5Zr alloy},
author = {Meng, Qingkun and Guo, Shun and Ren, Xiaobing and Xu, Huibin and Zhao, Xinqing},
abstractNote = {Despite the importance of single-crystal elastic constants of β-phase titanium alloys in understanding their low Young's modulus—a property crucial for many applications, such data are often difficult to obtain when the alloy composition is close to the instability limit of the β phase, where the presence of α" martensite precludes the fabrication of β-phase single crystal. In the present study, we extracted the single-crystal elastic constants of such a β-phase titanium alloy with low Young's modulus, Ti-36Nb-5Zr (wt. %), from polycrystalline specimens by using an in-situ synchrotron X-ray diffraction technique. It is indicated that the low Young's modulus of the alloy originates from the anomalously low shear modulus C₄₄ as well as the low shear modulus C', which is different from a common viewpoint that the Young's modulus of β-phase titanium alloys is dominantly controlled by the C'. This suggests that low C₄₄ is an important contributor to low Young's modulus for instable β-phase titanium alloys.},
doi = {10.1063/1.4896976},
url = {https://www.osti.gov/biblio/1168476}, journal = {Applied Physics Letters},
issn = {0003-6951: APPLAB},
number = 13,
volume = 105,
place = {United States},
year = {Mon Sep 29 00:00:00 EDT 2014},
month = {Mon Sep 29 00:00:00 EDT 2014}
}